Garmin GTN 750 Cockpit Reference Guide - Page 48

Message Description Action DATACARD ERRORSD card is invalid or failed. External SD card has an error and the unit is not able to read the databases. ChartView, FligthtCharts, and Terrain databases will not be accessible by the unit. Contact dealer for service. DATACARD REMOVEDReinsert SD card. External SD card was removed. Reinsert SD card. DATALINKGDL 69 is inoperative or connection to GTN is lost. The GTN is configured for a Garmin datalink (GDL 69 or 69A) and the GTN cannot communicate with the datalink. Data from the datalink will not be available. Contact dealer for service. DATA LOSTPilot stored data was lost. Recheck settings. User settings such as map detail level, NAV range ring on/off, traffic overlay on/off, and alert settings have been lost. Recheck settings. DATA SOURCEPressure altitude source inoperative or connection to GTN lost. The GTN is configured to receive pressure altitude but is not receiving it from any source. Leg types requiring an altitude source will no longer automatically sequence. Contact dealer for service. DATA SOURCEHeading source inoperative or connection to GTN lost. The GTN is configured to receive heading information but is not receiving it from any source. Heading up map displays will not be available. Contact dealer for service. DEMO MODEDemo mode is active. Do not use for navigation. Demo mode is in operation. Do not use for navigation. Power cycle the GTN to exit demo mode. Messages 42 GTN 725/750 Cockpit Reference Guide (CRG) 190-01007-04 Rev. B